Telescope sight mounting



d., m$ NN N Y a R my e /o OnNU 2 J1 u r l N m NNN @N mm .m sw V ww@ NP,m@ nw ww N W m pml/ IW E., f Oi m mw \,c M L d N W L @Nah/sv m.. @Hrm04N mm N y u m u w K E M P d T w m L W n m L m M n, x 6 L N mi m w NHY N2 n w M P p VN ww mw 565m wm United States This invention relates totelescope sight mountings for rearms.

An object of the invention is to provide improved means for detachablymounting on a rifle a telescope sight of the long-eye-relief type.

Another object is to provide a mounting including a track-forming basemember on which the telescope sight can be easily and rmly applied inlongitudinally adjusted position.

Still another object is to provide novel fastening means for detachablysecuring the track-forming base member to the rifle in a positionforward of the receiver.

A further object is to provide a telescope sight mounting which is ofsimple and reliable construction and capable of inexpensive manufacture.

The invention further consists in the several features hereinafterdescribed and claimed.

In the accompanying drawing,

FIG. l is a right-hand side elevational view of a rifle equipped with atelescope sight mounting of the invention, a rearwardly adjustedposition of the telescope sight being indicated in broken lines;

FIG. 2 is a detail side elevational view of the mounting on an enlargedscale;

FIG. 3 is a top view of the mounting, the telescope being indicated inbroken lines;

FIG. 4 is a bottom plan view of a track-forming base bar of themounting;

FIG. 5 is a transverse sectional elevational view taken generally on theline 5-5 of FIG. 2;

FIG. 6 is an enlarged transverse sectional view taken generally on theline 6-6 of FIG. 2;

FIG. 7 is an enlarged fragmentary sectional view taken generally on theline 7-7 of FIG. 3;

FIG. 8 is a top plan view of a clamp collar for the base bar;

FIG. 9 is a transverse sectional elevational view, similar to FIG. 5,showing a modified form of telescope sight mounting, and

FIG. 10 is a detail end view, partly in section, of a modified form ofbarrel-embracing collar.

In the drawing, the numeral designates a rie of conventional type, andthe numeral 16 designates a telescope sight which is mounted on therifle as hereinafter described. The rie includes a barrel 17 secured toa stock 18 and having a receiver 19 at its rear end. The usualhorizontal dovetail slot or groove 20 is formed transversely in theupper rear portion of the rifle barrel at a region forward of thereceiver. The rie is equipped with the customary front and rear metallicsights 21 and 22, the front sight being secured to the front end of thebarrel and the rear sight being secured to the receiver. The rifle ishere shown to include a tubular magazine 23 extending below the barrelin close parallel relation thereto, the front end portion of themagazine being attached to the barrel by a vertically elongated clampingloop member 24. A somewhat similar clamping loop member 25 secures therifle barrel to the fore-end of the stock.

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By way of example, the rifle is here shown to Ibe of the lever-actiontype.

An elongated track-forming lbase bar 26, which is fabricated from fiatbar stock, extends longitudinally above the rifle barrel forward of thereceiver and is rigidly secured to the barrel in slightly spacedparallel relation thereto, as hereinafter described. The base bar is oftrapezoidal cross-section with parallel top and bottom faces and beveledside edges, as seen in FIGS. 5 and 6, to form parallel dovetail ways 27,the wide horizontal face of the bar being at the top.

The rear end portion of the base bar has rigidly secured thereto adownwardly projecting attaching member 28 with a cylindrical verticalshank 29 which is riveted in a vertical bore 30 formed in the barcentrally of the width of the bar and which has integrally formed at itslower end a frusto-conical dovetail tenon 31. The tenon 31 has adetachable slidable t in the horizontal dovetail groove or slot 20formed in the rifle barrel. A vertical set screw 32 with a socketedwrench-receiving upper end is threaded coaxially in the attaching member28, as best seen in FIG. 7, and is engageable with the Hoor of thedovetail groove 20 to lock the frusto-conical tenon 31 in laterallyadjusted position in the groove. The attaching member 28 can beinexpensively formed as a screw machine part.

The front end portion of the track-forming base bar 26 has rigidlysecured thereto a downwardly projecting attaching member 33 whichincludes a cylindrical vertical shank 34, FIG. 6, snugly fitting in avertical bore 35 of the base bar and tightly secured to the bar as by anut 36 threaded on the shank and engaging the upper face of the bar. Theprojecting lower portion of the front attaching member 33 is in the formof a transversely extending at plate or bar 37 the opposite ends ofwhich have downwardly projecting arcuate gripping flanges 38 with innercoaxial dovetail grooves 39 of arcuate shape, FIGS. 4 and 6. A clampingring or collar 40 with a convexly rounded outer surface and a top gap oropening 41 snugly encircles the rifle barrel 17 forward of the front endof the stock and is exteriorly grooved at its open upper end to formlaterally spaced tenons 42, FIGS. 6 and 8, having coaxial convexlyformed segmental rustoconical gripping surfaces 43 engageable in thecomplementary dovetail grooves 39 of the attaching member 33. As seen inFIG. 6, the lower portion of the clamping collar 40 is thinned toincrease the resiliency of the collar and also to clear the tubularmagazine. A vertical set screw 44 with a socketed wrench-receiving upperend is threaded coaxially in the attaching member 33, as seen in FIG. 6,and passes through the collar opening 41 into engagement with the uppersurface of the rifle barrel to lock the attaching member firmly to thebarrel collar 40. The front attaching member 33 and the barrel collar 40can be inexpensively formed as screw machine parts.

A vertical set screw 45 with a socketed wrench-receiving upper end isthreaded through the track-forming base bar about midway of the lengthof the bar and is engageble with the upper surface of the rifle barrelto brace the assembled base bar and also to effect a slight bowing ofthe base bar when this is desired.

To mount the track-forming base bar 26 on the rifle, the front attachingmember 33 `is first engaged with the dovetail tenons 42 of the riebarrel collar 40, the bar being placed at an angle to the barrel forthis purpose, as indicated by broken lines in FIG. 3, to enter thetenons into engagement with the arcuate dovetail grooves 39' of theattaching member 33. The base bar is then swiveled rearwardly on itsjoint with the barrel collar 40 to the position over and parallel to thebarrel, the bar clearing the upper end of the clamping loop member 25,and the frusto-conical tenon 31 of the rear attaching member 28 enteringthe transverse dovetail groove 2() in the rifle barrel to a positionvertically above the barrel axis. The set screws 32, 44 and 45 are thentightened into engagement with the barrel.

The mounted base bar 26 forms a support for the telescope sight 16 whichis of the low-power long-eyerelief type, such as with `a power in therange of 1 to 3. By way of example, a telescope of this type may be of1.3 power. The telescope sight is here shown to include a cylindricaltube 46 secured to a bracket or fitting 47. The laterally spaced lowerside portions of the bracket are slightly resilient in a transversedirection and are provided with parallel, laterally spaced inwardlyfacing dovetail Vgrooves 48, FIG. 5, in which are engaged the oppositedovetail ways 27 of the track-forming base bar 26, the bracket beingslidably entered onto the base bar from the rear end of the bar. rPhetelescope 'assembly is slidably `adjusted along the base bar through aconsiderable range of travel, for example several inches, to suit thevision characteristics of the user, and is clamped in adjusted positionby transversely extending clamping screws 49 on the bracket. In thepresent instance, the telescope bracket is also provided with meansincluding convention-al adjusting devices 50 and 51 for effectingsighting adjustments. The position of the telescope forward of thereceiver 19 avoids interference with the conventional metallic sightingmeans on .the receiver and also avoids interference with ejection ofspent cartridges in the case of certain types of rifles.

To remove the telescope sight from the rifle the clamping screws 49 onthe telescope bracket are slightly loosened and the telescope is slidrearwardly off the base bar 26. The base bar may remain attached to therifle without interfering with sighting by means of the conventionalfront and rear sights 21 and 22 when lthis type of sighting is desired,the line of sight passing over the base bar.

The modied form of telescope sight mounting shown in FIG. 9 is adaptedfor accommodating a conventional type of telescope 16 without sightingadjustments. In this modified mounting, the telescope is secured to aninverted U-shaped bracket 57, which has an enlarged circular bight 58snugly embracing the telscope tube and a pair of parallel vertical legs59 with respective dovetail notches 60 in which are seated the oppositedovetail ways 27 of a track-forming base bar 26', the bracket legs beingslightly resilient and being connected by one or more transverseclamping screws 49, as in FIGS. 2 and 5, to clamp the bracket inslidably :adjusted position on the base bar 26. The base bar 26 and itsattachment to the rifle barrel may be identical with that of FIG. 2, butis here shown to have a different front end attachment in which a loopedclamping member 61 with `a contracted waist 62 snugly embraces both theriie barrel and the subjacent tubular magazine and has a top boss 63 towhich the front end of the base bar is secured by a snugly fittingpivot-forming vertical screw 64. The looped clamping member -61 is fixedto the rie by a transverse clamping screw 65' connecting the contractedwaist portions of the clamping member and passing between the barrel andthe magazine. In the case of a rie without the tubular magazine thelower portion of the clamping loop member may be omitted. In someinstances, the telescope may be carried on a pair of the brackets 57disposed in axially spaced relation. The telescope 16 is suitablysighted as by laterally adjusting the frusto-conical rear tenon 31,FIGS. 2 and 3, in the 4 dovetail groove 20 of the rifle barrel and byscrewing down the intermediate set screw 45, FIGS. 2 and 3, to effect aslight bowing of the track bar.

The modified form of barrel-embracing loop member or collar 70 shown inFIG. 10 is split at the bottom and clamped to the rifle barrel by atransverse screw 71 below the barrel. The upper portion of the collarhas arcuate segmental dovetail grooves 43, as in FIGS. 6 and 8, to formtenon portions 42 for swiveled interengagement with the arcuate groovedgripping iianges 3S, FIG. 6, of the front attaching member 33 of thetrack-forming base bar. The upper portion of the collar also has acentral opening 72 to admit the clamping screw 44, FIG. 6, of the frontlattaching member of the base bar.

I claim:

1. A telescope sight mounting for `a rie having a barrel with -areceiver and a transverse dovetail top groove forward of the receiver,comprising a track-forming base bar extending longitudinally above therie barrel forward of the receiver, front and rear fastening meansrigidly and detachably securing said base bar to the riiie barrel, saidfront fastening means having a detachable verticalaaxis swivelconnection with the barrel to permit turning of the base bar thereon toa position in substantial alignment with the barrel, and said rearfastening means including a dovetail tenon engageable in said dovetailbarrel groove and releasably clamped therein, said track-forming basebar being adapted to interengageably support a telescope sight thereonforward of the receiver in longitudinally adjusted clamped position.

2. A telescope sight mounting for a rifle having a bar rel with areceiver, comprising a track-forming base bar extending longitudinallyabove the barrel forward of the receiver, and front and rear fasteningmeans lrigidly and detachably securing said base bar to the riiiebarrel, said front fastening means including a barrel-embracing memberand a fastening member on the base bar having a swiveling vertical-axisfrusto-conical dovetail connection with the upper portion of thebarrel-embracing member, said front fastening means further including aclamping set screw coaxially threaded in said fastening member, saidtrack-forming base bar being adapted to interengageably support atelescope sight thereon forward of the receiver in longitudinallyadjusted clamped position.

3. A telescope sight mounting for a riiie having a barrel with areceiver at its rear portion, a track-forming base bar extendinglongitudinally above the rifle barrel forward of the receiver, a frontand rear fastening means for the base bar detachably secured to saidbarrel, said front fastening means including a barrel-embracing memberhaving laterally spaced opposed arcuate dovetail grooves at its yupperportion, said front fastening means further including a fastening memberrigidly attached to said base bar at the lower side thereof and havinglateral- -ly spaced depending projections with opposed arcuate dovetailgrooves interengageable with the dovetail grooves of the barrelembracingmember to form a vertical-axis swiveling connection between the base barand the barrelembracing member, -said base bar when disposedtransversely of the rifle barrel permitting engagement and release ofthe base bar projections with respect to the dovetail grooves of thebarrel-embracing member. 4. A telescope sight mounting for a rie havinga barrel 'with a transverse dovetail top groove forward of the receiver,comprising a track-forming base bar extending longitudinally above thebarrel forward of the receiver and having a vertical bore in its rearportion, and front and rear fastening means rigidly and detachablysecuring said base bar to the barrel, said front fastening means havinga detachable vertical-axis swivel connection with the barrel to permitswinging of the base bar thereon to a position in substantial alignmentwith the barrel, said rear fastening means including a fastening memberwith a frustoaconical tenon below the base bar and with a re` ducedupper coaxial shank tightly secured in said base bar bore, said rearfastening means further including a clamping set screw threadedCoaxially in said fastening member, said tenon being engageable in saiddovetail barrel groove and clarnpable therein by said set screw, saidtrack-forming base bar being adapted to interengageably support atelescope sight thereon forward of the receiver in longitudinallyadjusted clamped. position.

1,323,151 11/1919 Burton 42-1 ll/l951 6 Belding 33-50 Lowe 33-47 Pike42-1 Fischer et al. 33--50 Weaver 42-1 Felix 42-1 BENJAMIN A, BORCHELT,Primmy Examiner.

1. A TELESCOPE SIGHT MOUNTING FOR A RIFLE HAVING A BARREL WITH ARECEIVER AND A TRANSVERSE DOVETAIL TOP GROOVE FORWARD OF THE RECEIVER,COMPRISING A TRACK-FORMING BASE BAR EXTENDING LONGITUDINALLY ABOVE THERIFLE BARREL FORWARD OF THE RECEIVER, FRONT AND REAR FASTENING MEANSRIGIDLY AND DETACHABLY SECURING SAID BASE BAR TO THE RIFLE BARREL, SAIDFRONT FASTENING MEANS HAVING A DETACHABLE VERTICAL-AXIS SWIVELCONNECTION WITH THE BARREL TO PERMIT TURNING OF THE BASE BAR THEREON TOA POSITION IN SUBSTANTIAL ALIGNMENT WITH THE BARREL, AND SAID REARFASTENING MEANS INCLUDING A DOVETAIL TENSON ENGAGEABLE IN SAID DOVETAILBARREL GROOVE AND RELEASABLY CLAMPED THEREIN, SAID TRACK-FORMING BASEBAR BEING ADAPTED TO INTERENGAGEABLY SUPPORT A TELESCOPE SIGHT THEREONFORWARD OF THE RECEIVER IN LONGITUDINALLY ADJUSTED CLAMPED POSITION.